For one thing why is back on Lower day?
What are the reps/RI/intensities?
Not enough Hip/Ham work. You can do all the leg curls you want but youll still get more benefit from a few deadlifts.
Far too much isolation work aswell IMO. And machine work...
I think theyre over-complicating things. All you need for a BASIC upper/lower is in fact BASIC movements:
Session 1 (Upper)
Bent Over Row
Session 2 (Lower)
Whatever split you like. Periodize:
Cycle 1 @ 2x14-16 0:30-1:00 RI
Cycle 2 @ 3x8-10 1:30-1:45 RI
Cycle 3 @ 4x4-6 2:00-2:15 RI